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5e8938de98
These are some remnants of the shadow graph functionality that was added to support the graph builder changes in v0.8, but that has since been removed and so there are no remaining callers for these types and functions.
33 lines
1.3 KiB
Go
33 lines
1.3 KiB
Go
package terraform
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import (
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"github.com/hashicorp/terraform/addrs"
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"github.com/hashicorp/terraform/dag"
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"github.com/hashicorp/terraform/tfdiags"
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)
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// GraphWalker is an interface that can be implemented that when used
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// with Graph.Walk will invoke the given callbacks under certain events.
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type GraphWalker interface {
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EnterPath(addrs.ModuleInstance) EvalContext
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ExitPath(addrs.ModuleInstance)
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EnterVertex(dag.Vertex)
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ExitVertex(dag.Vertex, tfdiags.Diagnostics)
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EnterEvalTree(dag.Vertex, EvalNode) EvalNode
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ExitEvalTree(dag.Vertex, interface{}, error) tfdiags.Diagnostics
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}
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// NullGraphWalker is a GraphWalker implementation that does nothing.
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// This can be embedded within other GraphWalker implementations for easily
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// implementing all the required functions.
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type NullGraphWalker struct{}
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func (NullGraphWalker) EnterPath(addrs.ModuleInstance) EvalContext { return new(MockEvalContext) }
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func (NullGraphWalker) ExitPath(addrs.ModuleInstance) {}
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func (NullGraphWalker) EnterVertex(dag.Vertex) {}
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func (NullGraphWalker) ExitVertex(dag.Vertex, tfdiags.Diagnostics) {}
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func (NullGraphWalker) EnterEvalTree(v dag.Vertex, n EvalNode) EvalNode { return n }
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func (NullGraphWalker) ExitEvalTree(dag.Vertex, interface{}, error) tfdiags.Diagnostics {
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return nil
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}
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